Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionComerica Bank
Latest Disclosed Ownership53,608 shares
Latest Disclosed Value $ 9,235,152
Comerica Bank reports 16.68% decrease in ownership of WDC / Western Digital Corporation

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 53,608 shares of Western Digital Corporation (MX:WDC) valued at $9,235,152 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 64,339 shares of Western Digital Corporation. This represents a change in shares of -16.68% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F WESTERN DIGITAL COM 958102105 53,608 -10,731 -16.68 9,235 19.56 0.0368
2025-11-14 2025-09-30 13F WESTERN DIGITAL COM 958102105 64,339 -76,122 -54.19 7,725 -14.06 0.0291
2025-08-14 2025-06-30 13F WESTERN DIGITAL COM 958102105 140,461 3,070 2.23 8,988 61.83 0.0349
2025-05-14 2025-03-31 13F WESTERN DIGITAL COM 958102105 137,391 65,710 91.67 5,555 29.95 0.0233
2025-02-14 2024-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 71,681 -756 -1.04 4,274 -13.59 0.0172
2025-02-14 2024-12-31 13F WESTERN DIGITAL COM 958102105 71,681 -756 4,274 0.0143
2024-11-14 2024-09-30 13F WESTERN DIGITAL COM 958102105 72,437 -31,331 -30.19 4,947 -37.09 0.0196
2024-08-15 2024-06-30 13F WESTERN DIGITAL COMMON 958102105 103,768 -50,597 -32.78 7,863 -25.36 0.0327
2024-05-16 2024-03-31 13F WESTERN DIGITAL COMMON 958102105 154,365 31,566 25.71 10,534 63.81 0.0454
2024-02-14 2023-12-31 13F WESTERN DIGITAL COMMON 958102105 122,799 50,045 68.79 6,431 93.73 0.0296
2023-11-21 2023-09-30 13F WESTERN DIGITAL COMMON 958102105 72,754 72,754 3,320 0.0173
2023-08-22 2023-06-30 13F WESTERN DIGITAL COM 958102105 0 -60,774 -100.00 0 -100.00
2023-01-26 2022-12-31 13F WESTERN DIGITAL COM 958102105 60,774 2,183 3.73 2 -99.90 0.0176
2022-10-28 2022-09-30 13F WESTERN DIGITAL COM 958102105 58,591 5,626 10.62 2,046 -20.42 0.0172
2022-08-02 2022-06-30 13F WESTERN DIGITAL COM 958102105 52,965 664 1.27 2,571 -0.70 0.0211
2022-04-27 2022-03-31 13F WESTERN DIGITAL COM 958102105 52,301 -1,246 -2.33 2,589 -12.27 0.0188
2022-02-18 2021-12-31 13F WESTERN DIGITAL COM 958102105 53,547 -93,183 -63.51 2,951 -65.59 0.0217
2021-11-22 2021-09-30 13F WESTERN DIGITAL COM 958102105 146,730 66,040 81.84 8,575 78.39 0.0516
2021-08-26 2021-06-30 13F WESTERN DIGITAL COM 958102105 80,690 4,980 6.58 4,807 -6.73 0.0287
2021-04-28 2021-03-31 13F WESTERN DIGITAL COM 958102105 75,710 -14,658 -16.22 5,154 12.48 0.0307
2021-01-28 2020-12-31 13F WESTERN DIGITAL COM 958102105 90,368 -5,384 -5.62 4,582 14.69 0.0291
2020-10-30 2020-09-30 13F WESTERN DIGITAL COM 958102105 95,752 6,823 7.67 3,995 2.20 0.0290
2020-07-31 2020-06-30 13F WESTERN DIGITAL COM 958102105 88,929 14,900 20.13 3,909 29.78 0.0301
2020-05-01 2020-03-31 13F WESTERN DIGITAL COM 958102105 74,029 10,895 17.26 3,012 -28.76 0.0276
2020-02-07 2019-12-31 13F WESTERN DIGITAL COM 958102105 63,134 -901 -1.41 4,228 10.94 0.0320
2019-10-31 2019-09-30 13F WESTERN DIGITAL COM 958102105 64,035 -1,184 -1.82 3,811 13.49 0.0301
2019-08-02 2019-06-30 13F WESTERN DIGITAL COM 958102105 65,219 2,000 3.16 3,358 4.77 0.0269
2019-05-02 2019-03-31 13F WESTERN DIGITAL COM 958102105 63,219 1,507 2.44 3,205 22.05 0.0260
2019-02-06 2018-12-31 13F WESTERN DIGITAL COM 958102105 61,712 -223 -0.36 2,626 -23.82 0.0223
2018-11-01 2018-09-30 13F WESTERN DIGITAL COM 958102105 61,935 -13,570 -17.97 3,447 -42.20 0.0278
2018-08-01 2018-06-30 13F WESTERN DIGITAL COM 958102105 75,505 135 0.18 5,964 -11.61 0.0417
2018-05-01 2018-03-31 13F WESTERN DIGITAL COM 958102105 75,370 -924 -1.21 6,747 1.69 0.0482
2018-02-02 2017-12-31 13F WESTERN DIGITAL COM 958102105 76,294 396 0.52 6,635 1.90 0.0442
2017-11-06 2017-09-30 13F WESTERN DIGITAL COM 958102105 75,898 -3,575 -4.50 6,511 -13.42 0.0471
2017-08-03 2017-06-30 13F WESTERN DIGITAL COM 958102105 79,473 -4,910 -5.82 7,520 3.98 0.0563
2017-05-03 2017-03-31 13F WESTERN DIGITAL COM 958102105 84,383 -3,682 -4.18 7,232 15.66 0.0549
2017-02-08 2016-12-31 13F WESTERN DIGITAL COM 958102105 88,065 2,512 2.94 6,253 61.41 0.0495
2016-08-11 2016-06-30 13F WESTERN DIGITAL COM 958102105 85,553 27,877 48.33 3,874 65.91 0.0335
2016-05-11 2016-03-31 13F WESTERN DIGITAL COM 958102105 57,676 2,340 4.23 2,335 -23.82 0.0208
2016-02-05 2015-12-31 13F WESTERN DIGITAL COM 958102105 55,336 -3,674 -6.23 3,065 -34.62 0.0301
2015-11-12 2015-09-30 13F WESTERN DIGITAL COM 958102105 59,010 -59,754 -50.31 4,688 -49.67 0.0444
2015-08-13 2015-06-30 13F WESTERN DIGITAL COM 958102105 118,764 53,759 82.70 9,314 57.44 0.0400
2015-05-15 2015-03-31 13F WESTERN DIGITAL COM 958102105 65,005 -64,597 -49.84 5,916 -58.76 0.0501
2015-02-13 2014-12-31 13F WESTERN DIGITAL COM 958102105 129,602 60,194 86.72 14,346 112.38 0.0620
2014-10-21 2014-09-30 13F WESTERN DIGITAL COM 958102105 69,408 2,965 4.46 6,755 10.16 0.0596
2014-08-12 2014-06-30 13F WESTERN DIGITAL COM 958102105 66,443 -17,949 -21.27 6,132 -20.86 0.0521
2014-05-15 2014-03-31 13F WESTERN DIGITAL COM 958102105 84,392 2,541 3.10 7,748 12.83 0.0594
2014-02-11 2013-12-31 13F WESTERN DIGITAL COM 958102105 81,851 -6,222 -7.06 6,867 23.00 0.0532
2013-11-12 2013-09-30 13F WESTERN DIGITAL COM 958102105 88,073 88,073 5,583 0.0389
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.